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Stockholders' Equity (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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| Stockholders' Equity [Abstract] | ||||
| Number of shares authorized to be repurchased | 350,000 | 350,000 | ||
| Remaining number of shares available for repurchase | 260,728 | 260,728 | ||
| Shares | ||||
| Balance September 30, 2011 | 34,593 | |||
| Purchases | 12,026 | |||
| Issuances | (18,923) | |||
| Balance June 30, 2012 | 27,696 | 27,696 | ||
| Cost | ||||
| Balance September 30, 2011 | $ 862,000 | |||
| Purchases | 288,000 | |||
| Issuances | (490,000) | |||
| Balance June 30, 2012 | 660,000 | 660,000 | ||
| Stock-based compensation expense | $ 124,000 | $ 115,000 | $ 370,000 | $ 339,000 |
| Treasury shares issued | 18,923 | |||
| Weighted average fair value | $ 25.91 | |||
| Shares eligible for grant | 284,333 | 284,333 | ||
| Nonvested restricted shares | 174,563 | 174,563 | ||
| X | ||||||||||
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- Definition
Stock Issued During Period, Shares, Treasury Stock Reissued, Weighted Average Fair Value.
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- Definition
Treasury Stock, Number Of Shares [Abstract].
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- Definition
Treasury Stock, Value Of Shares [Abstract].
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Equity impact of the value of treasury stock (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.
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- Definition
The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.
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- Definition
Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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